Natsu was a maid of the Hyūga clan, and was the caretaker of Hanabi Hyūga. One day when Hanabi wanted to play with her sister, Natsu reminded her that Hinata was busy with her training. The next morning when they were taking a walk through the village, they witnessed Naruto Uzumaki being scolded by a villager. As Hanabi wondered why Naruto was treated as an outcast, Natsu told her to shun him. Later she watched over Hanabi finishing her studies, and told her to finish them before she could play with Hinata.

Natsu is a kind and responsible person, having been tasked with looking after Hanabi Hyūga. Despite this, like most of the villagers in Konoha she treated Naruto poorly when he was a child.

As a member of the Hyūga clan, Natsu possesses the Byakugan which grants her an almost 360° field of vision, x-ray vision, and the ability to see through chakra pathway system.